Bayesian methodology incorporating expert judgment for ranking countermeasure effectiveness under uncertainty: Example applied to at grade railroad crossings in Korea

This paper describes the formalization and application of a methodology to evaluate the safety benefit of countermeasures in the face of uncertainty. To illustrate the methodology, 18 countermeasures for improving safety of at grade railroad crossings (AGRXs) in the Republic of Korea are considered. Akin to “stated preference” methods in travel survey research, the methodology applies random selection and laws of large numbers to derive accident modification factor (AMF) densities from expert opinions. In a full Bayesian analysis framework, the collective opinions in the form of AMF densities (data likelihood) are combined with prior knowledge (AMF density priors) for the 18 countermeasures to obtain ‘best’ estimates of AMFs (AMF posterior credible intervals). The countermeasures are then compared and recommended based on the largest safety returns with minimum risk (uncertainty). To the author's knowledge the complete methodology is new and has not previously been applied or reported in the literature. The results demonstrate that the methodology is able to discern anticipated safety benefit differences across candidate countermeasures. For the 18 at grade railroad crossings considered in this analysis, it was found that the top three performing countermeasures for reducing crashes are in-vehicle warning systems, obstacle detection systems, and constant warning time systems.

Blind steganalysis : a countermeasure for binary image steganography

In this paper, we propose a new blind steganalytic method to detect the presence of secret messages embedded in black and white images using the steganographic techniques. We start by extracting several sets of matrix, such as run length matrix, gap length matrix and pixel difference. We also apply characteristic function on these matrices to enhance their discriminative capabilities. Then we calculate the statistics which include mean, variance, kurtosis and skewness to form our feature sets. The presented empirical works demonstrate our proposed method can effectively detect three different types of steganography. This proves the universality of our proposed method as a blind steganalysis. In addition, the experimental results show our proposed method is capable of detecting small amount of the embedded message.

Differential power analysis resistance of Camellia and countermeasure strategy on FPGAs

Security devices are vulnerable to Differential Power Analysis (DPA) that reveals the key by monitoring the power consumption of the circuits. In this paper, we present the first DPA attack against an FPGA implementation of the Camellia encryption algorithm with all key sizes and evaluate the DPA resistance of the algorithm. The Camellia cryptographic algorithm involves several different key-dependent intermediate operations including S-Box operations. In previous research, it was believed that the Camellia is stronger than AES due to the additional Whitening phase protecting the S-Box operation. However, we propose an attack that bypasses the Whitening phase and targets the S-Box. In this paper, we also discuss a lowcost countermeasure strategy to protect the Pre-whitening / Post-whitening and FL function of Camellia using Dual-rail Precharged Logic and to protect against attacks of the S-Box using Random Delay Insertion. © 2009 IEEE.

State funding of alcohol safety countermeasure programs. Final report.

National Highway Traffic Safety Administration, Traffic Safety Programs, Washington, D.C.

Bicycle lanes versus wide curb lanes: operational and safety findings and countermeasure recommendations.

Federal Highway Administration, Office of Safety and Traffic Operations, Washington, D.C.

Description and evaluation of the public information and education countermeasure of the New Hampshire Alcohol Safety Action Project. Final report.

National Highway Traffic Safety Administration, Office of Driver and Pedestrian Programs, Washington, D.C.

Determination of the operational performance requirements for a roadside accident countermeasure warrant system. Volume II - technical documentation. Final report.

Federal Highway Administration, Office of Safety and Traffic Operations Research and Development, McLean, Va.

PEDSAFE : pedestrian safety guide and countermeasure selection system /

"September 2004."

The assessment of ride service programs as an alcohol countermeasure. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

In-depth countermeasure report on selected countermeasures not covered separately in analytic studies. Annual report. 1973. Section II.

National Highway Traffic Safety Administration, Office of Alcohol Countermeasures, Washington, D.C.

Procedures manual for the post-operational reporting and data extension countermeasure.

National Highway Traffic Safety Administration, Washington, D.C.

The review and assessment of designated driver programs as an alcohol countermeasure approach. Final report.

National Highway Traffic Safety Administration, Washington, D.C.